ABBOTT JOHN S (Pres Varistar, Sr VP, M/I Plat) received a stock award from OTTER TAIL CORP

Compensation award — not an open‑market transaction. Less informative as a directional signal.

A · 1 award

ABBOTT JOHN S

Filed: 2/12/2026ACC: 0001639060-26-000006

InsiderABBOTT JOHN SCIK 1639060

→

IssuerOTTER TAIL CORPCIK 1466593

Officer· Pres Varistar, Sr VP, M/I Plat

Since Feb 2019

+5.79K

Net shares

Net buyer

$363.8K

Total sold

Open market trades

0B · 0S

Total transactions

10K acquired · 4.21K disposed

Non-Derivative Transactions2

Common Stock

Direct

A · Award

+8.40K

Price / share

$86.43

Trade value

$726.01K

% of position

18.0%

2/11/2026

46.70K→55.10K

Common Stock

Direct

F · Tax Withholding

−4.21K

Price / share

$86.43

Trade value

$363.78K

% of position

7.6%

2/11/2026

55.10K→50.90K

Total

Net shares

+4.19K

Net value

$362.23K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	2/11/2026	A · Award	+8.40K	$86.43	$726.01K	18.0%	46.70K	55.10K
Common Stock Direct	2/11/2026	F · Tax Withholding	−4.21K	$86.43	$363.78K	7.6%	55.10K	50.90K
Total			+4.19K		$362.23K

Derivative Transactions1

Restricted Stock Units

Direct

A · Award

Converts to

Common Stock

1.60K shares

+1.60K

Strike price

Held after

1.60K

Exercisable

—

2/10/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Restricted Stock Units Direct	Common Stock1.60K shares	2/10/2026	A · Award	+1.60K		—	1.60K

Non-Derivative Holdings (Post-Transaction)1

Common Stock

Indirect

Shares owned5K

Total

5K indirect5K

Security Title	Shares Owned	Ownership Type
Common Stock	5K	Indirect
Total	5K	5K indirect

Derivative Holdings (Post-Transaction)3

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

450.00

Shares owned

450.00

Exercise price

Expiration

—

Exercise window

—

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

1.27K

Shares owned

1.27K

Exercise price

Expiration

—

Exercise window

—

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

700.00

Shares owned

700.00

Exercise price

Expiration

—

Exercise window

—

Total

Underlying

2.42K

Owned

2.42K

Security	Underlying	Exercise Window	Expiration	Underlying Shares	Shares Owned
Restricted Stock Units Direct	Common Stock	—	—	450.00	450.00
Restricted Stock Units Direct	Common Stock	—	—	1.27K	1.27K
Restricted Stock Units Direct	Common Stock	—	—	700.00	700.00
Total				2.42K	2.42K